Abstract
Analytical data for three commercial niobium-base alloys were used to evaluate conventional chemical and vacuum fusion procedures for carbon, hydrogen, and oxygen. Chemical and optical spectrographic solution procedures developed are discussed regarding the determination of alloying amounts (1 to 25%) of molybdenum, tungsten, titanium, and zirconium. Various chemical, optical, and x- ray spectrographic procedures currently used by industry were compared by round- robin analyses of samples from the three niobium alloys. Examination of the round-robin data enabled conclusions to be drawn concerning the elements that will require additional analytical method development. (auth)
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